Gas and steam piston meter



2 Sheets-Sheet 1.

(No Model.)

A. G. GHRISTBNSEN.

, -GAS AND STEAM PISTON METER. No. 340,763. Y PatentedvApr. 27, 1886.

l y I TTUR/VEYS (No Model.) 2 Sheets-Sheet 2. A. C. GHRISTENSEN.

GAS AND STEAM PISTON METER.

No. 340,763. PatentedApr. 27, 1886.

A INI/Emme Arroz/VHS.

UNITED STATES PATENT OFFICE.

AUGUST C. CHRISTENSEN, OF BROOKLYN, N\V YORK.

GAs'AND STEAM PISVToN METER.

SPECIFICATION forming part of Letters Patent No. 340,763, dated April 27, 1886. Application filed January 21, 1886. Serial No. 189,240. (No model.) l

To all whom it may concern,.-

Be it known that I, AUGUST C. CHRIsTEN- SEN, of Brooklyn, county of Kings, and State of New York, have invented certain new and useful ImprovementsinGas and Steam Meters, of which the following is'a specification.

This invention relates to `certain improvements in the water and steam meter for which Letters Patent were granted to me heretofore, No. 269,260, dated December 19, 1882, which improvements are designed with a View to adapt the meter for measuring gas, and especially natural gas, and to reduce the expense of the meter, so as to adapt it for the purpose mentioned.

The invention consists of an inclosing-casing, the bottom-part of which has, in place of the cross-passages at the bottom of the casing, vertical passages and cross-pipes connecting said passages and devices by which the pipes are applied detachably to the bottom ofthe casing. l

The invention consists, further, of an inclosing-casing having a valve-chest, cylinders, and intermediate guides, combined with reciprocating pistons, gridiron slide-valves, screws connecting the slide-valves with the pistons, and helical springs interposed between the slide-valves and the heads of the screws, as will more fully appear hereinafter, and nally be pointed out in the claims.

In the accompanying drawings, Figure l represents a plan of my improved gas and steam meter in which the top plateand couliter are removed, so as -to show the admissionvalves. Fig. 2 is a bottom view ofthe same. Fig. 3 is a vertical longitudinal section on line a: x, Fig. l, taken through one cylinder; Fig. 4, a vertical transverse section on line y y, Fig. 3; Fig. 5, a vertical longitudinal section through the second cylinder, taken on line z a, Fig. 1; and Fig. 6 a vertical transverse section on line c o, Fig. 1.

Similar letters of reference indicate corresponding parts.

The inclosing casing or body of my improved steam and gas meter is formed of two parallel hollow cylinders, A A', of equal size, which are closed by heads A2, secured thereto, said cylinders being cast in one piece and provided with a valve-chest, A3, at the upper part, that extends transversely across both cylinders and carries above the same the casing for the usual counter employed in pistonmeters of this class.

The valve-chest A"s is provided with the usual inlet-port, a, for the gas or steam, the gas or steam passing from said chamber through the valve-passages of the pistons B B' tothe double T-shaped bottom part, A4, of the cylinders A A', said bottom part being provided with a central outlet-port, bx, as shown i-n Fig. 6. The pistons B B partake of the character of slidevalves,and are made of cylindrical shape and fitted closely to the interior of their respective cylinders. Both pistons are provided at their upper parts with narrow inletopenings b b', which communicate with diverging channels or passages d d', which are of the same shape in each piston.

Above the inlet openings b b of the pistons B B are arranged gridiron slide-valves O C', which are curved so as to tit to the rounded surface of the pistons. The openings j` f of the slide-valves O C register with the inletopenings b b of the pistons. Each gridiron slide-valve is provided at the ends with studs g, which abut against the end walls of the,

valve-chest A, when the piston arrives at the `end of its stroke, so as to cause the slide-valve to shift, closing thereby one set of openings and opening the other set.

The parts so far described are the same as the corresponding parts shown in my prior patent heretofore referred to.

The bottom A4 of each cylinder A A is arranged with short vertical holes or passagesz' i, which connect, respectively, with the ends of the cylinders A A', the channels al cl of the pistons and a cup-shaped channel, di, located at the bottom of each plunger intermediately between the channels d d'. channel d'1 establishes the connection with the short vertical passagest' i at the bottom of one cylinder and with those of the adjoining cylinder, so that the alternate workingof the pistons is produced.

Below the bottom A4 are arranged pipes D D' D2 D, which are provided with short offsets, that are fitted tightly to the smooth under side of the bottom A4 by fastening devices E E2. The pipes D D D2 D3 cross each other diagonally in the manner shown in dotted lines in Fig. 1 and in full lines in Fig. 2, and

The cup-shaped IOO are secured to the bottom A4 by bails E and binding-screws E2, two of the bails being provided at one end with studs n that press on the pipes D D', which are located closer to the bottom At, as shown clearly in Fig. 5, while the remaining bails are applied directly to the pipes D2 D3 and D D. The binding-screws E2 are passed through holes of the bails and retained thereon by screw-nuts n', as shown in Figs. 3 and 5.

The cross-pipes D D Drl D3 and vertical passages il t' have the advantage that they can be readily cleaned, so as to get all the coresand and dust out of the same, which is impossible when the cross-passages are cast in the bottom of the casing. If this core-sand and dust is not removed it will get into the cylinders and prevent the meter from operating properly, as the low pressure of the natural gas would not overcome the resistance exerted by the sand on the pistons. Another disadvantage is that the core-sand will score the interior surface of the cylinders and destroy the tight iit of the pistons.

At the upper part of the cylinders A A are formedrails m, parallel with the side walls of the valve-chest, which rails serve as guides for the gridiron slide-valves C C. The pis- Tons B B' arc provided with screws o, which pass through short slots o ot' the slide-valves, the-screws preventing the pistons from turning axially in the cylinders. The screws 0 are provided with enlarged heads, between which and the valves are arranged helical springs 02, which produce a gentle pressure on the slidevalves, so as to prevent them from jumping out of place when the pistons are running at considerable speed. rlhe screw o of one of the pistons is connected by an upwardly-extending stud, o, with the recessed end of the counter-lever L, so as to operate the same, as shown in Figs. 3 and 6, by which the connection of the piston and registering-counter is made.

The operation of my improved steam and gas meter is the same as the operation of the meier described in my prior patent referredto.

The advantages of my improved meter are that the pistons of the same have an easy and steady motion, so as to respond quickly and effectively, even to a low pressure exerted as new, and desire to secure by Letters Pat- A ent- 1. The combination of an inclosing-casing having a chest at the upper part-and a bottom with short vertical passages, reciprocatory pistons having channels forming slide-valves, slide-valves resting on said pistons, detachable cross-pipes connecting the vertical passages in the bottom of the casing, and fastening devices for attaching said cross-pipes to the bottom of the casing, substantially as set forth.

2. The combination of an inclosing-'casing having a chest at the upper part and a bottom with vertical channels, reciprocating pistons having channels forming slide-valves, gridiron slide-valves resting on said pistons, diagonal cross-pipes connecting the bottom-passages of the casing, bails for retaining said cross-pipes, and binding-screw posts for attaching the bails and pipes to the bottom of 8o the casing, substantially as set forth.

3. The combination of an inclosing-casing having cylinders and longitudinal guide-rails, reciprocatory pistons, curved gridiron slide- Valves resting on said pistons, and screws attached to the pistons and passing through slots at the slide-valves, substantially as set forth.

4. Ihe combination of airinclosing-casing having cylinders and guide-rails, reciprocatory pistons, gridiron slide-valves resting on said pistons, screws connecting the pistons with the slide-valves, and helical springs interposed between the heads of the screws and slide-valves, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presi ence of two subscribing witness.

A. C. GHRIS'IENSEN. Witnesses:

PAUL GEoPEL,

MARTINPETRY. 

